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Aquarium Calculators
Updated: September 17 2017

Water Changes by %
  
Aquarium Size in Gallons
  
% of Water Changed
  Number of Changes
  
Gallons of old water remaining
    
Enter the three values above.  Click "Calculate" to find the number of gallons of old water remaining!


Water Changes by Gallons
  
Aquarium Size in Gallons
  
Gallons of Water Changed
  Number of Changes
  
Gallons of old water remaining
    
Enter the three values above.  Click "Calculate" to find the number of gallons of old water remaining!





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